diff --git a/kasa/tests/conftest.py b/kasa/tests/conftest.py
index e709a58f..9cefd7ab 100644
--- a/kasa/tests/conftest.py
+++ b/kasa/tests/conftest.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import asyncio
 import warnings
 from unittest.mock import MagicMock, patch
 
@@ -96,6 +97,18 @@ def pytest_collection_modifyitems(config, items):
                 item.add_marker(requires_dummy)
 
 
+@pytest.fixture(autouse=True, scope="session")
+def asyncio_sleep_fixture():  # noqa: PT004
+    """Patch sleep to prevent tests actually waiting."""
+    orig_asyncio_sleep = asyncio.sleep
+
+    async def _asyncio_sleep(*_, **__):
+        await orig_asyncio_sleep(0)
+
+    with patch("asyncio.sleep", side_effect=_asyncio_sleep):
+        yield
+
+
 # allow mocks to be awaited
 # https://stackoverflow.com/questions/51394411/python-object-magicmock-cant-be-used-in-await-expression/51399767#51399767
 
diff --git a/kasa/tests/test_klapprotocol.py b/kasa/tests/test_klapprotocol.py
index 4862235a..ce370b5b 100644
--- a/kasa/tests/test_klapprotocol.py
+++ b/kasa/tests/test_klapprotocol.py
@@ -66,8 +66,6 @@ async def test_protocol_retries_via_client_session(
 ):
     host = "127.0.0.1"
     conn = mocker.patch.object(aiohttp.ClientSession, "post", side_effect=error)
-    mocker.patch.object(protocol_class, "BACKOFF_SECONDS_AFTER_TIMEOUT", 0)
-    mocker.patch("asyncio.sleep")
 
     config = DeviceConfig(host)
     with pytest.raises(KasaException):
@@ -140,7 +138,6 @@ async def test_protocol_retry_recoverable_error(
         "post",
         side_effect=aiohttp.ClientOSError("foo"),
     )
-    mocker.patch("asyncio.sleep")
 
     config = DeviceConfig(host)
     with pytest.raises(KasaException):